A Changing EarthTheories that Earth's surface has evolved over geologic time due to natural processes are well supported by physical evidence. Listed...
The Rock CycleROCK – naturally occurring solid mixture composed of minerals, smaller rock fragments, organic matter, or glass MAGMA – melted rock below...
Newton's 3 Laws of MotionNewton’s Laws of Motion In the late 1600’s, Isaac Newton described the relationship between the forces exerted on an object and its...
MotionNet Force Objects are often under the influence of multiple forces at any given time. For example, when you throw a ball, the ball is...